Continuous mixing-mill.



J. CROSSLEY.

CONTINUOUS MIXING MILL.

APPLICATION FILED FEB-5,19l7.

1 ,23 1,499. Patented June 26, 1917.

4 SHEETSSHEET I- m: uonms Prisms 00.. Pnomumm. wnsummnf;

J. CROSSLEY.

CONTINUOUS MIXING MIL APPLICATION FILED FEB-5.1917.

1,281,499 Patented June 26, 1917.

4 SHEETSSHEET 2- 1. CROSSLEY.

CONTINUOUS MiXlNG MILL.

APPLICATION man FEB. 5, I917.

Patented June 26, 1917.

4 SHEETS-SHEET 3- :NE Nnnms Ps'r'sns 0a.. PMO7D-LITHEL. WASHINGTON. n. c.

J. CROSSLEY.

CONTINUOUS MIXING MILL.

APPLICATION FILED FEB- 5. 1911.

1,231,499. Patented June 26,1917.

4 SHEETSSHEET 4.

.llllllll JOSEPH GROSSLEY, OF TRENTON, NEW JERSEY.

CONTINUOUS MIXING-MILL.

marge-1a.

Specification of Letters Patent. Patented J n 23 191?,

Application filed February 5, 1917. Serial No. 146,688.

To all whom it may concern:

Be it known that I, Josnrrr CRossLnY, a citizen of the United States, residing at Trenton, in the county of Mercer and State of New Jersey, have invented certainynew and useful Improvements in Continuous Mixing-Mills, of which the following is a specification.

My invention relates to the potters art, has especial reference to mills for mixing the material used for making pottery ves sels, such as crucibles and the like, has for its object the reduction in cost and saving in time in preparing the material for the molds. r V

The invention consists in certain improvements, which will be hereinafter fully disclosed and particularly pointed out in the specification and the claims.

The prevailing practice of preparing the material or composition of materials for the manufacture of crucibles comprises placing the pulverized clay, graphite and other ingredients in layers one upon the othervalternately in vats, and adding thereto the required amount of water, from 18 to 20 per cent. and allowing the water to soak through and thoroughly permeate the mass, and requires a number of hours to effect a thorough soaking or wetting.

The soaked material is then cut out of the vats in thin vertical layers and put in a mixing mill, where it is agitated and discharged upon a floor and shoveled back into the mill by manual labor, requiring two men to do the work.

This operation is repeated until the ingre clients are properly mixed, and requires from one half to one hour of time.

The batch is then shoveled into a finishing mill, where it is treated from thirty to forty minutes, and requires the labor of two men to supply the mill.

In contradistinction to the foregoing practice, it is my purpose to put the pulverized composition properly moistened in a mixing mill in which it 1s agltated for a predetermined length of time, and transferring the batch from the lower end or bottom of the chamber of the mill automatically to the upper end thereof. This operation is repeated until the batch has been thoroughly mixed,

when it is transferred to a finishing mill,

where it is prepared for use in molds.

During this operation a like mixing mill mav be brought into use, and while the batch in one mill is being discharged into the finishing mill, the batch in the other mill is undergoing a like agitation or mixing and transference from the lower to the upper end repeatedly so that by the time the batch in one mill is discharged into the finishing mill, the batch in the other mill will be ready to be discharged into the finishing mill, while the discharged mill will be refilled with a fresh batch of material.

I also propose to dispense with the soaking vats, by charging the pulverized ingre clients into a stationary receptacle, such as a cylinder provided with revoluble agitators or mixing blades, by which the ingredients are mixed preparatory to being treated in the mills, and in which operation, they become secondary mills or mixers.

The batch or charge in the primary mixers may be mixed dry, or water may be supplied thereto while it is being mixed, or the batch may be moistened by supplying water thereto While it is being transferred from the primary mixer to the secondary mixer.

The discharge of the material from the primary and the secondary mixers is controlled by suitable gates or valves operated by an attendant.

In the accompanying drawings, which form part of this specification Figure l is a front elevation of a machine embodying my invention.

Fig. 2 is a rear elevation of the same with parts broken away to show interior construction.

Fig. 3 is a side elevation of the same.

Fig. ,4: is a top plan View with the primary mixer removed, and

Fig. 5 is a detail section of the transferring device, on an enlarged scale.

Reference being had to the drawings and the designating characters thereon, the nu meral 1 indicates the primary mixers, in which the batch receives its initial treatment, and each consists of a fixed or stationary cylinder provided with a revoluble horizontal shaft 2 supported in pedestals or bearings 3, 3, and on the shaft 2 are secured radially extending agitating arms or beaters 4 of well known construction, the hubs of which are properly secured to said shaft in the usual manner. Each cylinder is pro vided with a charging door 5 and a dis charging door 6, and a pipe 7 extending 1ongitudinally through the cylinder, slotted or perforated at 7 to distribute water evenly to the batch of material to be treated, the supply of which water is regulated by "a valve 8.

The batch may be mixed dry in the primary mixers, or it may be supplied with a part, 01'- an of the water required, or more water may be supplied thereto in its passage from said mixers through a funnel 9, by a like perforated or slot'ted pipe 10 dontrolled by a valve 11.

12 indicates the mixing mill of which there may be two and become secondary mixers in the operation of the fcontinuohs mixing of {a batch of material. These mills are exact duplicates, but will be designated as 12 and 12 v for the purpose of 'describiiig their relation and consecnti've operation. Each mill comprises a vertical mixing chamber, cylindrical inform, and is provied with a centrally arranged vertical shaft 1'3 extending through the bottom of the mixchamber and on 'wliich shares, are secur'ed a reve'rsely curved arm or scraper 14, for pushing the material out of the chamber, and radial agitating arms 15 "extending from hubs 16 which are properly securedto s'ai'cl shaft 13. On opposite sides 'ofthe transverse center of the mixing chainbe'rs are openings 17 controlled by gates 18 for the {discharge of the inaterial into the cylinder 19'; and openings 20 controlled by gates 21 for d i'schargiiig the l'nateriai into the finishing mill 22. I v

Tlie gates 18 and 21 are operated by a rack 23 and pinion 24on shaft 25 provided with hand-wheel 26, or in any preferred inann'er.

The cylinder 19 may be designated a transierr'ing medium which is properly supported and at its lower end conirnuiiicates with the lower end or the mixin min 12, 01: with it andthe mill 12, when the two mills are used, through suitable openings registering with the openings 17 and controlled respectively by the gates 18. The cylinder 19 is provided with a "centrally arranged 'vei'tr cal revoluble shaft 28, on which is "a worm conveyer 29 for agitatingand raising ore le- -va ting the material or batch as it proceeds from the chamber or chambers tithe secondary mixin in-ill or mills 12and 12' when forced out by the scraper 14 I On the np'per end of the'cylinder 19 isan axiailly movable turret or spout 30 controlled by a raclr31'and pinion 32 operated by shaft 31 and wheel 32 for directing the discharge of material into the mills 12'or 1'2, and on the upperend of the shaft 28 is a scraper 33 operating in the turret'30, 'for'cu'tting off the ascending material in layers, and pushing it out'of the turret or spout irito the upper end of the mill in which it is to be i further treated.

The finishing mill 22 -may be'of any aproved form of construction as shown in my Patent No. 473,497, hearing date of April 26.th,1892,and receives the material from the niill or mills 1'2, 12* as it is discharged through the openings 20 controlled by gates 21, and is discharged through nozzle 22.

34 indicates a motor of any preferred form and "from which power is transmitted through shaft '35 having a pinion 36 which meshes with master wheel 37 on shaft 38 on which are miter'gear wheels 39 engaging Wheel 40 on 41 having a pinion 42 envvheel 43 en shafts 13 of the second are ima es 12 and 12 At the opposite end 'of shaft '38 are secured sprocket wheels 44 and 45, the'fornier engaged by 'c'haih 46 which engagessprocket wheel 47 on shaft 48 having has gear 49 engaging gear "50 oh hgitatihg shaft '51 in the iinishiirg mill 22.

sped-aka w-h eel 45 carries a chain 52-, engagingsprocket wheel 58' oh shaft 54, on which is a beveled or miter gea-r wheel 55 engaging 56 011 horizontal shaft 57 for expelling the contents ofithe finishing 1ni1122. V

(in one oft-he shafts 13 is secured a sproeka wheel 58 provided with chain '59, engaging sprocket wheel '60 on shaft for operating the coiiveye-r 29 and scraper Gates 6 controlling the discharge of the primary mixers 1 are operated "by rack 61 sag-med by 'pi'ni'ohs '62roperated by hand wheel ea naviag {has an described my invention, what I claim is- V i 1. A device {tottreating piflveri-zed inatte'r, comprising a plu'raiity of 'niills reach having a revolabie agitator therein and exit in the wall of (Each mill at its lower end, and a member external thereto and commuhica ting at lower end with said mixing 'mi'lis through said exits and provided with anagi'tator and -c'onveyer.

'2. A device for treating pulverized matter, comprising a primary mixer, means for inoisteniiig said pulverized matter while in transit, a -secondary "mixing 'Illlll having a revoluble agitator therein and an exit in its wall at the lower end, and a member external tlieieto communicating at its lower end with said in i'xing mill through said exit, and provided with an agitator and raising conveyer. y 3. A device for treatingjpulverized inatterfconipiising a mixing 'Inill having a plurality of exi ts or discharge passages in its wall at the lower end, means for forcibly ejecting the material in 'saidniil'l through said exit-s, member 'ext'ernai thereto and enamel-inni s: its lower with the mixing *n'iill 'tliioughjone of said exits, and provided wane revolubleconveyer, and an additional grnill supplied from the mixing mill throughthe'othe exit. 7 a t 4. In a device "of the class described, a

member comprising a cylinder having an inlet passage in the wall thereof at its lower end, means for controlling said passage, and an axially movable spout on the upper end of the cylinder, with a revolulole scraper therein.

5. A plurality of mixing mills, each provided with exits or discharge passages in their walls and at their lower ends, a device for transferring the contents of said mills and communicating therewith at its lower Copies of this patent may be obtained for five cents each, by addressing the end through said passages, and means for controlling the passages and placing the transfer-ring device in communication through said exits with the mixing mills.

In testimony whereof I affix my signature in the presence of two witnesses.

JOSEPH CROSSLEY. Witnesses:

FRANK K. GROVE, SAML. H. BULLOCK.

Commissioner of Patents,

Washington, D. C. 

